I'm more worried about the amount of reading than the amount of writing. A character can be passive for a while and get involved only when I have time, but if I don't keep abreast of events, then it's harder.
I'm thinking exactly the same. But I figured I may as well give it a go. If I get a little overwhelmed I can either cut down my involvement in things, stop reading about other people's story lines that don't relate to my own, or take a little break from the game.